Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4

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	Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4
	Liu Jianguo; Qin Ye; Yan Chuanwei
通讯作者	Liu Jianguo()
	2010-04-14
发表期刊	ACTA CHIMICA SINICA
ISSN	0567-7351
卷号	68 期号:7 页码:722-726
摘要	The molal enthalpies of solution of VOSO4 center dot 2.76H(2)O(s) with various molalities in water and in aqueous sulfuric acid (0.5 mol.kg(-1)) Delta H-s(m), were measured by a solution-reaction isoperibol calorimeter at 298.15 K. The value of -Delta H-s(m) in aqueous sulfuric acid was lower than that in water, which shows that energy state of VOSO4 in aqueous H2SO4 was higher than that in pure water. An improved Archer's method was put forward in terms of ionic association equilibrium of VOSO4 and second dissociation equilibrium of H2SO4. Using the improved method, the standard molal enthalpies of solution Delta H-s(m)circle minus = 29.18 kJ.mol(-1) in pure water and Delta H-s(m)circle minus = -25.79 kJ.mol(-1) in aqueous sulfuric acid were obtained, respectively. According to calculation, the molality of VO2+ was larger in VOSO4-H2SO4 mixed solution than that in water.
关键词	vanadium redox flow battery enthalpy of solution vanadyl sulfate sulfuric acid
收录类别	SCI
语种	英语
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000277418700020
出版者	SCIENCE PRESS
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/102210
专题	中国科学院金属研究所
通讯作者	Liu Jianguo
作者单位	Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu Jianguo,Qin Ye,Yan Chuanwei. Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4[J]. ACTA CHIMICA SINICA,2010,68(7):722-726.
APA	Liu Jianguo,Qin Ye,&Yan Chuanwei.(2010).Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4.ACTA CHIMICA SINICA,68(7),722-726.
MLA	Liu Jianguo,et al."Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4".ACTA CHIMICA SINICA 68.7(2010):722-726.